Hypoampul syringe



July 29, 1924.

J` H. WEDIG HYPOAMPUL SYRINGE Filed Feb. 9, 1923 Patented July 29, 1924.

JOHN H. WEDIG, OF GRANITE- CITY, ILLINOIS.

HYPGAMPUL SYRINGE.

Application filed February 9, 1923. Serial No. 617,994.

To all whom t may concern Be it known that I, JOHN H. WEDIG, a citizen of the United States, residing at Granite City, in the county of Madison and State of Illinois, have invented certain new and useful Improvements in I-Iypoampul Syringes, of which the following is a specification.

This invention relates to certain new and useful improvements in hypo-ampul syringes, the peculiarities of which will be hereinafter fully described and claimed.

The main objectof my invention is to provide means for hermetically sealing the operative parts of a hypodermic syringe until ready for use,-such parts including a hollow ampullary plunger hermetically sealed and containing a medicament that is thus doubly sealed, but can be readily opened when said tube is fractured at predetermined points and the syringe prepared for use.

In the accompanying drawing on which like reference numerals indicate corresponding parts, Fig. 1 represents a central longitudinal section of a device exemplifying my invention; Fig. 2 a detached portion of said device; Fig. 3, a similar view of the opposite end; Fig. 4, a detached portion forming the main middle part of the device as it appears when the ends are removed from Fig. l; Fig. 5, a detached view of the main portion of the tube with the piston and plunger removed and the ampullary end of the plunger fractured to give access to the medicament for pouring it into the main portion of the tube; and Fig. 6 a view of the main portion of the tube forming the syringe barrel with the lmedicament located therein and the plunger inserted ready for use.

2 designates the walls of a tube having the ends 3 and 4 sealed and adapted for ready opening by means of scratches or cut lines on the circumferential outer surface at the planes 5-5 and 6 6. Near the plane 5-5 is mounted a fixed partition 8 in which is centrally secured a cannula needle 9 that is exposed when the end 3 is removed by fracture at the plane 5-5, but meanwhile is protected in the needle chamber 10. On the opposite side of the partition 8 is slidably mounted in the tube, a piston 1l having a reduced end 12 adapted to fit in the end of a plunger provided with a socket 13 formed by constricting the wall of a smaller tube so that it forms a closure at 14 and then swells out again and the outer end 15 is reduced to a neck-like form and sealed, constituting a closed chamber as well as a plunger. The outer end of the plunger is readily fractured at the plane 7 7 after the outer tube is fractured at the plane 6-6 and exposes the ampullary end of the plunger as in Fig. 4. In this chamber is stored a medicament of any suitable form or state, whether gas, liquid or solid, and since it is sealed therein it is doubly protected by the inner tube and the enclosing outer tube, yet may be readily opened and the liquid, or other medicament contained in this chamber 16, may be deposited in the chamber 17 between the fixed wall 8 and the piston 11 when replaced in the main portion of the outer tube-which main portion thus constitutes the barrel of the syringe. The air in said chamber 17, and one or two drops of the liquid or medicament, are expressed by the piston when the needle is erected preliminary to use as a hypodermic syringe.

I claim:

l. A device of the character described comprising ahermetically sealed tube adapted to be fractured at predetermined points and having a iixed partition adapted to form the butt end of a'hypodermic syringe, a cannula needle mounted in said partition, and a piston and plunger slidably mounted in said tube,-said plunger forming an inner sealed chamber for a medicament adapted to be used with said syringe.

2. A device of the character described' ing a medicament hermetically sealed thereother side of the partition,-the end of said in and adapted for fracture at the outer aminner tube opposite the socket end being 10 pullate end, substantially as described. ampullate and herinetically sealed, substant. In a` device of the character described, tialiy as described. 5 an inner tube having a constricted portion In testimony whereof I have affixed my near one end constituting an integral partisignature. tion and forming a socket `at said end, and a storage chamber for a medicament on the JOHN H. VVEDIG. 

